U.S. patent application number 17/627709 was filed with the patent office on 2022-08-11 for stator assembly and stator for motor.
This patent application is currently assigned to Schaeffler Technologies AG & Co. KG. The applicant listed for this patent is Schaeffler Technologies AG & Co. KG. Invention is credited to Yu Gong, Lei Liu.
Application Number | 20220255388 17/627709 |
Document ID | / |
Family ID | |
Filed Date | 2022-08-11 |
United States Patent
Application |
20220255388 |
Kind Code |
A1 |
Gong; Yu ; et al. |
August 11, 2022 |
STATOR ASSEMBLY AND STATOR FOR MOTOR
Abstract
A stator assembly and stator for a motor is provided that
directly installs in a conductor slot a slot wedge having a width
approximately the same as the width of the conductor slot. The slot
wedge is limited in three directions, circumferential, radial, and
axial, by means of cooperation between a slot wedge pressing ring,
a conductor, and a sidewall of the conductor slot, and at the same
time, the slot wedge is capable of preventing the conductor from
falling out of the conductor slot. In addition, in the stator
assembly for a motor disclosed, when the slot wedge is installed,
the slot wedge may not only be inserted and installed in the
conductor slot along the axial direction, but may also be inserted
and installed in the conductor slot along the radial direction, and
thus, the installation mode is flexible, which may improve the
installation efficiency.
Inventors: |
Gong; Yu; (Shanghai, CN)
; Liu; Lei; (Shanghai, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Schaeffler Technologies AG & Co. KG |
Herzogenaurach |
|
DE |
|
|
Assignee: |
Schaeffler Technologies AG &
Co. KG
Herzogenaurach
DE
|
Appl. No.: |
17/627709 |
Filed: |
July 17, 2019 |
PCT Filed: |
July 17, 2019 |
PCT NO: |
PCT/CN2019/096352 |
371 Date: |
January 17, 2022 |
International
Class: |
H02K 3/487 20060101
H02K003/487 |
Claims
1. A stator assembly for a motor, comprising an iron core
comprising a cylindrical body portion and a plurality of tooth
portions protruding from the body portion of the iron core toward
an inner radial side and arranged along a circumferential
direction, a conductor slot that extends along a radial direction
being formed between every two tooth portions of the iron core
adjacent in the circumferential direction; a plurality of
conductors accommodated and installed in each of the conductor
slots, and being arranged along the radial direction; slot wedges
accommodated and installed in each of the conductor slots, wherein
the slot wedges are located on the inner radial sides of the
plurality of conductors in each of the conductor slots; and slot
wedge pressing rings fixedly installed to the tooth portions of the
iron core on the inner radial side, and interfering with a part of
each of the slot wedges from the inner radial side in the radial
direction, the conductors and the slot wedge pressing rings thus
limiting the slot wedges in the radial direction
2. The stator assembly for a motor according to claim 1, wherein
two axial ends of the tooth portions of the iron core are each
formed with a stepped structure that is concave toward an outer
radial side, and the slot wedges are each formed with a notch
corresponding to the stepped structure, and each of the stepped
structures and the corresponding notch are provided with one slot
wedge pressing ring, allowing the slot wedge pressing rings to
limit the slot wedges in an axial direction.
3. The stator assembly for a motor according to claim 1, wherein
the slot wedge pressing rings are fixedly installed to the tooth
portions of the iron core in an interference fit.
4. The stator assembly for a motor according to claim 2, wherein
the iron core comprises a plurality of stator laminate sheets and
two stator end pressing plates laminated together in an axial
direction while being aligned with each other, the two stator end
pressing plates are located at two ends of the iron core, and the
slot wedge pressing rings are fixedly installed to the stator end
pressing plates by pressing against the stator end pressing plates
from the inner radial side.
5. The stator assembly for a motor according to claim 4, wherein
each of the stator end pressing plates comprises an annular end
pressing plate body and a plurality of end pressing plate teeth
protruding from the end pressing plate body toward the inner radial
side and arranged along the circumferential direction, each of the
stator laminate sheets comprises an annular laminate sheet body and
a plurality of laminate sheet teeth protruding from the laminate
sheet body toward the inner radial side and arranged along the
circumferential direction, the body portion of the iron core is
formed by laminating the end pressing plate body and the laminate
sheet body together in the axial direction, and the tooth portions
of the iron core are formed by laminating the end pressing plate
teeth and the laminate sheet teeth together in the axial
direction.
6. The stator assembly for a motor according to claim 5, wherein an
inner radial end of each of the end pressing plate teeth is closer
to an outer radial side than the inner radial end of the
corresponding laminate sheet tooth, such that the end pressing
plate teeth and the laminate sheet teeth form the stepped structure
of the tooth portions of the iron core for the installation of the
slot wedge pressing rings.
7. The stator assembly for a motor according to claim 6, wherein
when an inner diameter of the stator end pressing plate is D1 and
an inner diameter of the stator laminate sheets is D2, and an outer
diameter of the slot wedge pressing is d1 and an inner diameter of
the slot wedge pressing ring is d2, the following are satisfied:
h=(D1-D2)/2, d1=D1, and d2=D2.
8. The stator assembly for a motor according to claim 5, wherein at
least one of: a radial inner circumferential face of the slot wedge
pressing ring is roughly flush with an inner radial end face of the
laminate sheet teeth; and an axial thickness of the slot wedge
pressing ring is roughly equal to that of the stator end pressing
plates.
9. A stator, comprising at least one stator assembly for a motor
according to claim 1.
10. The stator according to claim 9, wherein the stator comprises a
plurality of stator assemblies for a motor, and the plurality of
stator assemblies for a motor are connected in series to each other
in an axial direction in a coaxial manner.
11. A stator assembly for a motor, comprising: an iron core
including a cylindrical body portion and a plurality of tooth
portions protruding from the body portion of the iron core toward
an inner radial side and arranged along a circumferential
direction, the iron core further comprising: a plurality of stator
laminate sheets each having an annular laminate sheet body and a
plurality of laminate sheet teeth protruding from the laminate
sheet body toward an inner radial side; a first stator end pressing
plate and a second stator end pressing plate, the plurality of
stator laminate sheets being disposed therebetween in an axial
direction, wherein the first and the second end pressing plates
each have an annular end pressing plate body and a plurality of end
pressing plate teeth protruding from the end pressing plate body,
wherein the cylindrical body portion of the iron core is formed by
laminating the end pressing plate body of the end pressing plates
and the laminate sheet body of the stator laminate sheets together
in the axial direction, and the tooth portions of the iron core are
formed by laminating the end pressing plate teeth and the laminate
sheet teeth together in the axial direction; a plurality of
conductor slots extending along a radial direction, wherein each
conductor slot is formed between every two tooth portions of the
iron core that are adjacent in a circumferential direction; a
plurality of conductors disposed within each of the conductor slots
and arranged along the radial direction; a plurality of slot
wedges, wherein one slot wedge of the plurality of slot wedges is
disposed in each of the conductor slots, wherein the slot wedges
are located on the inner radial side of the iron core; and a first
slot wedge pressing ring and a second slot wedge pressing ring
fixedly installed to the tooth portions of the iron core on the
inner radial side and arranged to secure the conductors and slot
wedges within the conductor slots.
12. The stator assembly according to claim 11, wherein the first
and the second stator end pressing plates have a first inner
diameter and the plurality of stator laminate sheets have a second
inner diameter less than the first inner diameter such that a first
stepped structure is formed on one axial end between the first
stator end pressing plate and one of the stator laminate sheets and
a second stepped structure is formed on an opposite axial end
between the second stator end pressing plate and one of the stator
laminate sheets.
13. The stator assembly according to claim 12, wherein the first
inner diameter is defined by inner radial side faces of the end
pressing plate teeth and the second inner diameter is defined by
inner radial side faces of the laminate plate teeth.
14. The stator assembly according to claim 12, wherein the first
slot pressing ring is fixed in the first stepped structure and the
second slot pressing ring is fixed in the second stepped structure
via an interference fit.
15. The stator assembly according to claim 13, wherein the slot
wedges are each formed with a notch on each end corresponding to
the first and the second stepped structure such that the first and
the second end pressing plates are fixed in the corresponding
notches and stepped structures.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is the U.S. National Phase of PCT Appln.
No. PCT/CN2019/096352 filed Jul. 17, 2019, the entire disclosure of
which is incorporated by reference herein.
TECHNICAL FIELD
[0002] The present disclosure relates to the field of motors, and
in particular, to a stator assembly for a motor and a stator
comprising the stator assembly for a motor.
BACKGROUND
[0003] At present, in the field of motors for new energy vehicles,
there are increasingly higher requirements for performances such as
low harmonic components, low noise and high efficiency. The use of
a slot wedge, in particular a magnetic slot wedge, may improve the
foregoing performances. However, the slot wedge fixing structure of
the stator in a conventional motor has an impact on the foregoing
performances.
[0004] FIG. 1a is a schematic structural diagram showing a stator
assembly for a motor, and FIG. 1b shows a slot wedge fixing
structure of the stator assembly in FIG. 1a. Specifically, as shown
in FIG. 1a, the stator assembly for a motor comprises an iron core
10 and conductors 30 and slot wedges 20 that are installed to the
iron core 10. The iron core 10 comprises a cylindrical body portion
of the iron core 101 and a plurality of tooth portions of the iron
core 102 protruding from the body portion of the iron core 101
toward an inner radial side and uniformly distributed in a
circumferential direction C. A conductor slot 10h is formed between
every two tooth portions of the iron core 102 adjacent in the
circumferential direction C. As shown in FIG. 1b, a slot wedge 20
and a plurality of conductors 30 are installed in each conductor
slot 10h, and the slot wedge 20 is located at inner radial sides of
the conductors 30, thereby preventing the conductors 30 from
falling out of the conductor slot 10h.
[0005] A slot wedge fixing structure of the foregoing stator
assembly for a motor comprises a dovetail slot extending along an
axial direction and formed on circumferential sidewalls of two
adjacent tooth portions of the iron core 102 facing each other, and
the slot wedge 20 has a shape corresponding to that of the dovetail
slot, such that the slot wedge 20 is capable of being inserted into
the dovetail slot along the axial direction to be fixed between
every two adjacent tooth portions of the iron core 102. As such, on
the one hand, the dovetail slot will make the width of each tooth
portion of the iron core 102 equal to an actual width DO of the
tooth portion of the iron core shown in FIG. 1b, which actually
reduces the width of the tooth portion of the iron core 102,
thereby increasing magnetic saturation of the tooth portion of the
iron core 102 and lowering the performance of the motor; on the
other hand, the slot wedge 20 has to be inserted into the conductor
slot 10h (that is, inserted into the dovetail slot) along the axial
direction in the process of being installed between every two
adjacent tooth portions of the iron core 102, making the
installation process complicated and inefficient.
SUMMARY
[0006] The present disclosure has been made in view of the
deficiencies of the prior art as described above. An object of the
present disclosure is to provide a stator assembly for a motor with
a slot wedge fixing structure that will not produce any adverse
effect on the performance of a stator. Another object of the
present disclosure is to provide a stator comprising the foregoing
stator assembly for a motor.
[0007] To achieve the above objects, the following technical
schemes are adopted.
[0008] The present disclosure provides a stator assembly for a
motor, comprising an iron core comprising a cylindrical body
portion of the iron core and a plurality of tooth portions of the
iron core protruding from the body portion of the iron core toward
an inner radial side and arranged along a circumferential
direction, a conductor slot that extends along a radial direction
being formed between every two tooth portions of the iron core
adjacent in the circumferential direction; conductors, a plurality
of the conductors being accommodated and installed in each of the
conductor slots, and being arranged along the radial direction;
slot wedges accommodated and installed in each of the conductor
slots, enabling the slot wedges to be located on the inner radial
sides of the plurality of conductors in each of the conductor
slots; and slot wedge pressing rings fixedly installed on the tooth
portions of the iron core on the inner radial side, and interfering
with a part of each of the slot wedges from the inner radial side
in the radial direction, the conductors and the slot wedge pressing
rings thus limiting the slot wedges in the radial direction.
[0009] Preferably, two axial ends of the tooth portions of the iron
core are each formed with a stepped structure that is concave
toward an outer radial side, and the slot wedges are each formed
with a notch corresponding to the stepped structure, and each of
the stepped structures and the corresponding notch are provided
with one slot wedge pressing ring, allowing the two slot wedge
pressing rings to limit the slot wedges in an axial direction.
[0010] More preferably, the slot wedge pressing rings are fixedly
installed on the tooth portions of the iron core in an interference
fit.
[0011] More preferably, the iron core comprises a plurality of
stator laminate sheets and two stator end pressing plates laminated
together in the axial direction while being aligned with each
other, the two stator end pressing plates are located at two ends
of the iron core, and the slot wedge pressing rings are fixedly
installed on the stator end pressing plates by pressing against the
stator end pressing plates from the inner radial side.
[0012] More preferably, each of the stator end pressing plates
comprises an annular end pressing plate body and a plurality of end
pressing plate teeth protruding from the end pressing plate body
toward the inner radial side and arranged along the circumferential
direction, each of the stator laminate sheets comprises an annular
laminate sheet body and a plurality of laminate sheet teeth
protruding from the laminate sheet body toward the inner radial
side and arranged along the circumferential direction, the body
portion of the iron core is formed by laminating the end pressing
plate body and the laminate sheet body together in the axial
direction, and the tooth portions of the iron core are formed by
laminating the end pressing plate teeth and the laminate sheet
teeth together in the axial direction.
[0013] More preferably, an inner radial end of each of the end
pressing plate teeth is closer to the outer radial side than the
inner radial end of the corresponding laminate sheet tooth, such
that the end pressing plate teeth and the laminate sheet teeth form
stepped structures of the tooth portions of the iron core for the
installation of the slot wedge pressing rings.
[0014] More preferably, when an inner diameter of the stator end
pressing plate is D1 and an inner diameter of the stator laminate
sheet is D2, and an outer diameter of the slot wedge pressing ring
is d1 and an inner diameter of the slot wedge pressing ring is d2,
the following are satisfied: h=(D1-D2)/2, d1=D1, and d2=D2.
[0015] More preferably, a radial inner circumferential face of the
slot wedge pressing ring is roughly flush with an inner radial end
face of the laminate sheet teeth; and/or an axial thickness of the
slot wedge pressing ring is roughly equal to that of the stator end
pressing plate.
[0016] The present disclosure further provides a stator, comprising
at least one stator assembly for a motor according to any one of
the foregoing technical schemes.
[0017] More preferably, the stator comprises a plurality of stator
assemblies for a motor, and the plurality of stator assemblies for
a motor are connected in series to each other in the axial
direction in a coaxial manner.
[0018] By the adoption of the foregoing technical schemes, the
present disclosure provides a novel stator assembly for a motor and
a stator comprising the stator assembly for a motor. The stator
assembly omits a dovetail slot formed at the tooth portion of an
iron core in the prior art, but directly installs in a conductor
slot a slot wedge having a width approximately the same as the
width of the conductor slot, the slot wedge is limited in three
directions, circumferential, radial, and axial, by means of
cooperation between a slot wedge pressing ring, a conductor, and a
sidewall of the conductor slot, and at the same time, the slot
wedge is capable of preventing the conductor from falling out of
the conductor slot. As such, compared to the stator assembly for a
motor according to the prior art, the described slot wedge fixing
structure will not reduce the width of the tooth portion of the
iron core, and thus the magnetic flux of the tooth portion of the
iron core does not easily reach oversaturation, thereby preventing
the slot wedge fixing structure from producing an adverse effect on
the performance of the stator. In addition, in the stator assembly
for a motor according to the present disclosure, when the slot
wedge is installed, the slot wedge may not only be inserted and
installed in the conductor slot along the axial direction, but may
also be inserted and installed in the conductor slot along the
radial direction, and thus, the installation mode is flexible,
which may improve the installation efficiency.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] FIG. 1a is a schematic structural diagram showing a stator
assembly for a motor; and FIG. 1b is a partially enlarged schematic
diagram showing the stator assembly for a motor in FIG. 1a.
[0020] FIG. 2a is a schematic structural diagram showing a stator
assembly for a motor according to the present disclosure; FIG. 2b
is a partial structural diagram showing the stator assembly for a
motor in FIG. 2a; and FIG. 2c is an enlarged view showing a partial
structure of the stator assembly for a motor in FIG. 2a.
[0021] FIG. 3a is a schematic diagram showing a stator end pressing
plate of the stator assembly for a motor in FIG. 2a; FIG. 3b is a
schematic diagram showing a stator laminate sheet of the stator
assembly for a motor in FIG. 2a; and FIG. 3c is a schematic diagram
showing a slot wedge pressing ring of the stator assembly for a
motor in FIG. 2a.
DETAILED DESCRIPTION
[0022] Exemplary implementations of the present disclosure will be
described below with reference to the drawings. It should be noted
that, unless indicated otherwise, "axial direction", "radial
direction" and "circumferential direction" described herein refer
to an axial direction, a radial direction and a circumferential
direction of a stator assembly (iron core) for a motor,
respectively.
[0023] As shown in FIG. 2a to FIG. 2c, the stator assembly for a
motor according to the present disclosure comprises an iron core 1,
a plurality of slot wedges 2, a plurality of conductors 3, and two
slot wedge pressing rings 4, all of which are assembled
together.
[0024] Specifically, in this implementation, the iron core 1
comprises a cylindrical body portion of the iron core 11 and a
plurality of tooth portions of the iron core 12 protruding from the
body portion of the iron core 11 toward an inner radial side, and
the tooth portions of the iron core 12 have the same shape and
dimension. In a circumferential direction C, one conductor slot 1h
extending in a radial direction is formed between every two
adjacent tooth portions of the iron core 12. Since the plurality of
tooth portions of the iron core 12 are uniformly distributed in the
circumferential direction C, the plurality of conductor slots 1h
are also uniformly distributed in the circumferential direction
C.
[0025] The iron core 1 comprises two stator end pressing plates 1a
(as shown in FIG. 3a) and a plurality of stator laminate sheets 1b
(as shown in FIG. 3b) laminated together in an axial direction.
Viewed from the axial direction, the stator end pressing plates 1a
and the stator laminate sheets 1b are roughly aligned with each
other. In the axial direction, the plurality of stator laminate
sheets 1b are disposed between the two stator end pressing plates
1a, such that the two stator end pressing plates 1a are located at
two axial ends of the iron core 1.
[0026] As shown in FIG. 3a, the stator end pressing plates 1a are
made of metal materials such as silicon steel. Each of the stator
end pressing plates 1a comprises an annular end pressing plate body
1a1 and a plurality of end pressing plate teeth 1a2 protruding from
the end pressing plate body 1a1 toward the inner radial side, and
the plurality of end pressing plate teeth 1a2 have the same shape
and dimension and are uniformly arranged along the circumferential
direction C. As shown in FIG. 3b, the stator laminate sheets 1b are
preferably made of silicon steel. Each of the stator laminate
sheets 1b comprises an annular laminate sheet body 1b1 and a
plurality of laminate sheet teeth 1b2 protruding from the laminate
sheet body 1b1 toward the inner radial side, and the plurality of
laminate sheet teeth 1b2 have the same shape and dimension and are
uniformly arranged along the circumferential direction C. Further,
the end pressing plate body 1a1 and the laminate sheet body 1b1 are
identical in both shape and dimension. The number of the end
pressing plate teeth 1a2 and the number of the laminate sheet teeth
1b2 are the same; and in terms of shape and dimension, the end
pressing plate teeth 1a2 and the laminate sheet teeth 1b2 differ
only in radial dimensions.
[0027] As such, the end pressing plate body 1a1 and the laminate
sheet body 1b1 are laminated and fixed together in the axial
direction while being aligned with each other to form the body
portion of the iron core 11, and the end pressing plate teeth 1a2
and the laminate sheet teeth 1b2 are laminated and fixed together
in the axial direction to form the tooth portions of the iron core
12. When the end pressing plate teeth 1a2 and the laminate sheet
teeth 1b2 are laminated together in the axial direction, due to the
difference in radial dimensions of the end pressing plate teeth 1a2
and the laminate sheet teeth 1b2, an inner radial end of each of
the end pressing plate teeth 1a2 is closer to the outer radial side
than an inner radial end of the corresponding laminate sheet tooth
1b2, such that the end pressing plate teeth 1a2 and the laminate
sheet teeth 1b2 form stepped structures for the installation of the
slot wedge pressing rings 4.
[0028] In this implementation, one slot wedge 2 is accommodated and
installed in each conductor slot 1h. In each conductor slot 1h, the
corresponding slot wedge 2 is located on the inner radial sides of
a plurality of conductors 3, such that the slot wedge 2 can limit
the corresponding conductors 3 on the inner radial sides. An axial
length of each slot wedge 2 is equal to that of the iron core 1,
enabling two axial ends of the slot wedge 2 to be aligned with two
axial ends of the iron core 1. As shown in FIG. 2b and FIG. 2c, two
axial ends of each slot wedge 2 are each formed with a notch 2c
corresponding to the foregoing stepped structure of the tooth
portion of the iron core 12, and the notch 2c is also used for the
installation of the slot wedge pressing ring 4.
[0029] In this implementation, a plurality of conductors 3 are
accommodated and installed in each conductor slot 1h. In each
conductor slot 1h, the plurality of conductors 3 are arranged in
the radial direction by abutting against each other. Sidewalls used
to form the conductor slot 1h can limit the conductors 3 on the
outer radial side and two circumferential sides. An axial length of
each conductor 3 is equal to that of the iron core 1, enabling two
axial ends of the conductor 3 to be aligned with two axial ends of
the iron core 1.
[0030] In this implementation, two slot wedge pressing rings 4 are
provided, and each of the slot wedge pressing rings 4 is fixedly
installed at the stepped structure of the tooth portion of the iron
core 12 and the notch 2c of the corresponding slot wedge 2 from the
inner radial side, such that the slot wedge pressing rings 4 and
the slot wedges 2 structurally interfere in the radial direction
and axial direction. As such, sidewalls used to form the conductor
slot 1h can limit the slot wedge 2 from two circumferential sides,
the conductors 3 can limit the slot wedge 2 on the outer radial
side, and the two slot wedge pressing rings 4 can not only limit
the slot wedge 2 from the inner radial side, but also limit the
slot wedge 2 from two axial sides respectively. Therefore, the slot
wedge 2 is limited in the circumferential direction, radial
direction, and axial direction.
[0031] Preferably, the two slot wedge pressing rings 4 are fixedly
installed on the tooth portions of the iron core 12 by pressing
against inner radial side faces of the end pressing plate teeth 1a2
of the stator end pressing plate 1a from the inner radial side and
in an interference fit.
[0032] To ensure that the dimension of the slot wedge pressing ring
4 will not affect the operation and assembly of the stator, as
shown in FIG. 3a to FIG. 3c, it is assumed that an inner diameter
of the stator end pressing plate 1a defined by the inner radial
side faces of the end pressing plate teeth 1a2 is D1 and an inner
diameter of the stator laminate sheet 1b defined by the inner
radial side faces of the laminate sheet teeth 1b2 is D2, an outer
diameter of the slot wedge pressing ring 4 is d1, an inner diameter
of the slot wedge pressing ring 4 is d2, and a radial thickness of
the slot wedge pressing ring 4 is h, then the following will be
satisfied: h=(D1-D2)/2, d1=D1, and d2=D2. In the case that the
foregoing conditions are satisfied, the interference fit between
the slot wedge pressing ring 4 and the tooth portion of the iron
core 12 is ensured by using tolerance.
[0033] More preferably, h=(D1-D2)/2. As such, after the slot wedge
pressing ring 4 is fixedly installed at the stepped structure of
the tooth portion of the iron core 12 and the notch 2c of the slot
wedge 2, a radial inner circumferential face of the slot wedge
pressing ring 4 is roughly flush with an inner radial end face of
the stator laminate sheet 1b (roughly on the same cylindrical
face). In addition, an axial thickness of the slot wedge pressing
ring 4 is roughly equal to that of the stator end pressing plate
1a. As such, after the slot wedge pressing ring 4 is fixedly
installed at the stepped structure of the tooth portion of the iron
core 12 and the notch 2c of the slot wedge 2, an axial end face of
the slot wedge pressing ring 4 is roughly flush with that of the
stator end pressing plate 1a.
[0034] Further, the present disclosure also provides a stator for a
motor, the stator comprising at least one stator assembly for a
motor with the foregoing structure. When the stator comprises a
plurality of stator assemblies for a motor, the plurality of stator
assemblies for a motor may be connected in series to each other in
the axial direction in a coaxial manner, such that a stator having
a predetermined axial length can be obtained.
[0035] Certainly, the present disclosure is not limited to the
above-mentioned implementations, and those skilled in the art can
make various modifications to the above-mentioned implementations
of the present disclosure under the teaching of the present
disclosure without departing from the scope of the present
disclosure. In addition, it should also be noted that:
[0036] (i) Although not explicitly described in the foregoing
specific implementations, it should be understood that the slot
wedge according to the present disclosure may be inserted into the
conductor slot along the axial direction or along the radial
direction. In this way, the slot wedge installation mode is
flexible, which may facilitate installation and improve the
installation efficiency.
[0037] (ii) Although not explicitly described in the foregoing
specific implementations, it should be understood that the width of
the slot wedge may be the same as or slightly smaller than that of
the conductor slot, such that the slot wedge can be installed in
the conductor slot. In addition, the material of the slot wedge is
different from that of the conductor. Furthermore, the cross
section of the slot wedge is not limited to a wedge shape, but may
be in any shape such as a rectangle.
[0038] (iii) Although not explicitly described in the foregoing
specific implementations, it should be understood that when the
stator comprises a plurality of stator assemblies for a motor
according to the present disclosure, one slot wedge pressing ring
and one stator end pressing plate may be shared between every two
adjacent stator assemblies.
[0039] (iv) In the present disclosure, the stator end pressing
plate may be made of the same material as that of the stator
laminate sheet. As such, the stator end pressing plate may be
formed by changing radial dimensions of laminate sheet teeth of a
plurality of stator laminate sheets and then laminating the
plurality of stator laminate sheets together.
LIST OF REFERENCE NUMERALS
[0040] 10 Iron core
[0041] 101 Body portion of iron core
[0042] 102 Tooth portion of iron core
[0043] 10h Conductor slot
[0044] 20 Slot wedge
[0045] 30 Conductor
[0046] D0 Actual width of tooth portion of iron core
[0047] 1 Iron core
[0048] 11 Body portion of iron core
[0049] 12 Tooth portion of iron core
[0050] 1h Conductor slot
[0051] 1a Stator end pressing plate
[0052] 1a1 End pressing plate body
[0053] 1a2 End pressing plate tooth
[0054] 1b Stator laminate sheet
[0055] 1b1 Laminate sheet body
[0056] 1b2 Laminate sheet tooth
[0057] 2 Slot wedge
[0058] 2c Notch
[0059] 3 Conductor
[0060] 4 Slot wedge pressing ring
[0061] d1 Outer diameter of slot wedge pressing ring
[0062] d2 Inner diameter of slot wedge pressing ring
[0063] D1 Inner diameter of stator end pressing plate
[0064] D2 Inner diameter of stator laminate sheet
[0065] h Radial thickness of slot wedge pressing ring
[0066] C Circumferential direction
* * * * *